Aquascape AquaBlox Water Storage Module Block System for Pondless, Waterfall, Water Features and Garden Drainage, Large, 32-gallons

Modular lightweight design makes installation quick, safer and less expensiveOver 3 times more water storage capacity than gravelHolds appx. 7.4 gallons of water per cubic footLess labor required to excavate and move gravel for basinEasier to clean and less prone to clogging than traditional gravel basins